Data Sheet AEXT-401A Axon ADAU Extender Card Data Sheet Download Resource Login to download this resource Username Enter your Curtiss-Wright Defense Solutions username. Password Enter the password that accompanies your username. Forgot password? Don’t have an account? Register here. The AEXT-401A is an extender card, which allows modules contained in an Axonite (AITE-401A) remote housing to connect to an ADAU chassis.